Improvement in let-off mechanisms for braiding-machines



UNITED STATES JAMEs MQoAiiPEnTEn, 0E rnovnnncannonn IsLAND. l.

`IMPROVEMENT lN LET-OFF MECHANISMS FOR BRAlDING-MACHINES. i

Specification forming part of Letters Pateht No. 57,084, dated August 14, 1866.

To all whom it may concern:

Beit known that I, J AMES M. CARPENTER, of the city and county of Providence, and State of Rhode Island, have made a new and useful invention having reference to Braiding-Machines; and I do hereby declare the same to be fully described in the following specication, and represented in the accompanying drawings, of whicl1` Figure lis a side elevation, and Fig. 2 a vertical section, of `a braiding-machine racer and its spool provided with my invent-ion, which is what may be termed a let-oif mechanism,77 its purpose being to preserve due tension on the yarn or thread and effect the (le-wl,l Vlivery of such yarn as occasion may require while the racer may be in operation.`

The invention also will allow the spool to rise on its spindle or carrier-tube for the purpose of setting free thethre-ad when caught on or by any portion of the mass Wound on the spool. It` frequently or sometimes happens that a thread .will get so caught and that the draft on it will be in suchl direction that it will fail to free the thread and revolve the spool, the consequencebeing abreakage of the thread. My invention obviates this` diiiiculty.

In the drawings, A denotes the racer, of which a is the spindle and b the tension-weight `standard or post, the latter being formed in the usual manner with thread eyes or passages, they being disposed in itin the ordinary way.

C is the bobbin or spool, which, in this case, instead of being arranged directly on the spindle, is placed on a carrier or tube, T, which encompasses the spindle and rests on a shoul` der e, at the lower part thereof.

This tube T should be capable of freely revolving on the spindle, and it has a small stud, j', extending from it into a groove, g, made lengthwise in the bore of the spool. The spool should be capable of rising freely on the tube, the stud and groove serving tocause the spool and tubes or carrier to revolve together when the spool may be in revolution.

A cup-shaped,` gear, D, is also fixed on the carrier or tube T, and serves to support the lower head of the spool, which, when at its lowest position, rests on the bottom of the concavity of the gear.

The gear D has one set of teeth only, they being arranged at equal distances apart, and each having the form of a segment of a circle or a close approximation thereto, as represented in the drawings, although this form is not absolutely necessary. It is advantageous in promoting the correct action of the wheel. The said gear so made is intended to operate with thetension-weight L, which slides vertically on the post b.`

Eig. 3 `exhibits. a, side elevation, Eig. 4 an inner side view, and Fig. 5 a top view, of.

the tension-weight. Fig. 6 is a horizontal section of it and the gear.

From the Vlower part of the inner side ofthe tension-weight a dent, h, is projected. The weight on its inner side is also provided with a Wedgeshaped stop or lip, t', which is formed and arranged with respect to the dent l1,` in manner as represented in the drawings.

Whenever the tension-weight may be raised high enough to carry the stop-lip above the gear the latter will be free to be lrevel ved by the draft on the thread, and will revolve until that tooth which may be next in` rear of the tooth set free by the lip may bring up against the dent. On the descent of the weight, and after the dent may have been depressed below the gear, the wedge-lip, by its action against the advanced tooth, will insure a rotary movement of the wheel, which will continue until that tooth which was previously against the dent may bring up against the lip. The draft of the thread on the spool also contributes to effect such rotary motion.

The Vwedge-lip and the dent enable but a single series of teeth to be used on the wheel instead of two series, as employed when the lip is not wedged.

Another mode in which I have contemplated l from the gear into a corresponding hole made in the spool and parallel with its bore.

Havingdescribedmyinvention,whatIclaim,

`and vdesire to have secured to me by Letters Patent, is as follows:

l. The combination ofthe tube T, the studf, I dle, and the tension-Weight, substantially as and groove g, or their equivalent, with the specified.

spool, its spindle, and the let-off mechanism, JAMES M CARPENTER o1' its equivalent.

2. The improved let-ofi` mechanism, oonsist- Witnesses:

ing' 0f the gear with one range of teeth, and ofthe dent and Wedge-lip applied to the spin;

THOMAS A. MILLETT, HENRY MARTIN. 

